Preheat the oven 350°F. Line 2 baking sheets with parchment paper.
Beat butter with confectioners sugar until light and fluffy.
Add the milk powder and vanilla extract; stir until combined.
Stir in the all purpose flour and baking powder and mix until combined. If the dough seems too dry, add a 1~2tbsp milk. If the dough is too wet, add 1~2tbsp of flour. The dough should be nice and pliable.
Lightly flour the work surface, roll out the dough into an ½" thick rectangle. Use a 2½~3" round cutter and cut the dough into crescent shape cookies. Re-roll the scraps and cut into more cookies.
Transfer the cookies onto the prepared baking sheets and bake for 8~10 minutes or until the tops are slightly firm and bottoms are lightly golden.
Remove from the oven and place them on cooking racks to cool completely.
Melt the chocolate chips with shortening in a microwave safe bowl. Make sure to stir every 30 seconds to melt the chips evenly.
Once the cookies have cooled, dip them in the chocolate and place them on a wire rack to set.
When the chocolate has set, they are ready to be served or packed for gifting!!